Rock-drilling tool



Dec. 24, 1929. E. G. GARTIN Rocx DRILLING Tool.

Filed March 31. 1922 Patented Dec. Z4, 1929 stares recrear orrlca ELMERG. GARTN, OF CLAREBIONT, NEN HAIYIEnHR-E, ASSEGNOR TO SULLEVAN MA-CHINERY COMPANY, A CORPORATION OF IIASSACHSETTS RGCK-DR-ILLING- TOOLApplication filed March 31, 1922. Serial No. 54 ,485.

My invention relates to rock drilling tools or the like.

1t has for its object to provide an improved drilling mechanism and moreespecially to provide an improved mechanism of the stoper type wherebyaccess to the usual cleansing fluid supply means may be readily obtainedand whereby the feeding means common to such devices may be quicklydetached Aherefpm.

1n the accompanying drawings 1 have shown for purposes of illustrationtwo forms which my invention may assume in practice.

In these drawings,-

Fig. 1 is a view in partial elevation and in longitudinal section of oneform of my invention.

F ig. 2 is a detail sectional view through the rear end of the motorcylinder and the front end of the feeding mechanism.

3 is a transverse section on a plane correspondingto the line 3-3 ofFig. 2.

Fig. 4 is a detail sectional view taken on the line H of Fig. 3.

Fig. 5 is a sectional view similar to Fig. 2, showing a modification.

Fig. 6 is a transverse section on the line G of Fig. 5.

In the illustrative construction shown in Figs. 1 to l it will be notedthat 1 haveshown a. stoper of generally ferm including a drill motor ofany suitable type, herein of the valveless percussive type and mcludinga cylinder 1 having a hammer piston 2 therein, the hammer pistonoperating through a tappet 8 on a drill steel el carried in a suitablechuck 5 in the front head (3 of the motor. As in the usual construction,suitable cleansing fiuid supply means generally designated 7 extendsaziially through the piston to terminate either 1n the striking plug 3or in the steel l, as may be preferred, and has its rear end removablyconnected to a rear motor head 8 by suitable mechanism, generallyindicated at 9, in such manner lthat the cleansing fluid supply meansmay be witl drawn from the rear end of the cylinder` Cooperating withthe drill motor is a feeding mechanism which .may be of any desired typeand herein includes elements 10 and 11, the former of which is the feedcylinder, while the latter is a feed piston, this feeding mechanismbeing connected, as hereafter described, to the drill motor and beingadapted when a foot 12 herein carried on the end of the feed piston 11is disposed against a support, to feed the drill motor away from thesupport and toward the work, the feed being controlled by any suitablemeans of well known construction, not shown.

1n the form of my invention shown in Figs. 1 to e, it will be observedthat the forward end of the feed cylinder terminates in an externalcollar 13 which is adapted to be pressed into engagement with the rearhead 8 of the motor. 1t will further be noted that side rods 1^: and 15which extend from the front head 6 through the cylinder member 1 andthrough the rear head 8 are surrounded at their rear ends by suitablyformed locking members 16, these members having projecting ears 17extending toward each other and provided with wedge or cam surfaces 18(see Fig. a) with which suitable cooperating locking means 19 isdesigned to coact. Surrounding the feed cylinder 10 is a generallyannular member, the member 19 above referred to, which member has a pairo-f lugs 21 disposed at opposite sides thereof and formed with inclinedsurfaces 22 adapted to engage and coact with the inclined surfaces 18 onthe member 1G. rlhe member 19 also has a lug 23 intermediate the lugs 21which may be struck for the rotation of the member 19 as hereafterdescribed.

As will be observed from Fig. 1, the member 19 is of different thicknessat dierent points, the points of maximum thickness occurring in adiamo-tric line at right angles to a line connecting the middle pointsof the lug 21 whereby collar engaging surfaces 2% are formed which restupon the collar 13 and force it into engagement with the rear head S.

From the description which has been given, the mode of operation of thismechanism will be clearly apparent. lVhen it is desired to attach thefeed cylinder and feeding mechanism to the drilling motor, the parts arebrought into juxtaposition and the member 19 is moved so that theinclined surfaces of the lugs 21 slip in under the inclined surfacesoperating with said locking means upon rotao-f the members 16 and thenby the striking tion of the latter and associated with said side of asmart blow upon the lug- 23 the member rod-s.

19 is turned about the axis of the Leed cylinder in such way as to causeforward movement of the member 19 and the pressing by it of the feedcylinder into tight engagement with the rear head 8. By simply knockingthe lug. 23 in the opposite direction so as to cause the lugs 21 toslide out of engagement with the members 16, the feed cylinder can bereadily removed for overhauling or for permitting access to thecleansing iuid supply means. Suitable packing washers may be employed,if desired, between the forward end of the feed cylinder and the rearhead 8.

In Figs. 5 and 6 a dierent form of my invention is disclosed. In thisform the feed cylinderV 10 is provided with an annular collar 13 as inthe earlier form described, but cooperatingv therewith is a clampingyoke 25 pivotally connected as indicated at 26 to the rear head 8 andhaving arms 27 and 28 extending on opposite sides of the feed cylinder,as shown in Fig. 6. These arms are provided with projections orthickened portions 29 adapted to engage the collar 13 and a lcross bar30 carried by a pivoted bolt 31 is adapted to extend across the freeends of the arms 27 and 28, and, upon tightening of the nut 32 upon thebolt 31, the yoke will be caused to rigidly press the collar 13 intoengagement with the rear head 8 of the motor. It will be evident thatthe feed cylinder can be detached for any purpose by simply looseningthe nut 32, swinging the bolt 31 about its pivot onthe head 8, and thenwithdrawing the feed cylinder rearwardly as the yoke 25 pivots about itspivot 26.

While I have in this application specifically' described two forms whichmy invention may assume in practice, it will be understood that theseforms of the same are shown for purposes of illustration and that theinvention may be modified and embodied in various other forms Withoutdeparting from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. A drilling mechanism comprising a drilling motor having side rods forholding the parts thereof together, alined feeding means thereforincluding a feed cylinder, and means for holding said cylinder and motortogether including a rotatable locking member surrounding said cylinder,and cooperating lockingl means associated with said side ro s.

2`. A drilling Vmechanism comprising a In testimony whereof I affix mysignature.

ELMER G. GARTIN.

